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or if your control board shows 3 red flashes (pressure switch error)
and radiant heaters
Heavy-Duty Industrial Build: Features a high-torque
It is specifically engineered for unitary pneumatic valves with a 5 CV flow coefficient
Flexible Installation: Features an 8-inch probe length with an adjustable mounting flange for precise sensor placement in high-velocity air streams
Lochinvar & A.O. Smith 100167804 Board 319847-401 or if your control boardThe Lochinvar & A. O. Smith 100167804 Integrated Control Board is the primary OEM replacement part for the Armor AW400 condensing water heater series. As a veteran grade HVACR control module, this board manages the critical sequence of operation, including the 10 second prepurge cycle, spark to flame trial for ignition, and continuous flame rectification. It acts as the master processor for ignition control and temperature regulation, ensuring the